Residential Flat Roof Detail

A roof is considered to be flat when it is of a slope of 1 5 o to the horizontal.

Residential flat roof detail.

Choosing a flat roof how to find the best options for your commercial roofing project. All three types of flat roofing cost 250 to 350 per square 100 square feet but prices vary according to region and size of the roof. Some observers suggest it s harder to replace a flat roof than a traditional pitched shingle roof because of the labor required to remove its layers especially on older flat roofs. This could mean flat roofs may not raise the same red flags they used to.

Cad details document name pdf dwg download all cad construction details 37 1 mb 3 4 mb mc01 identification of roof areas 694 kb 167 kb mc01a single layer underlayment 678 kb 302 kb mc01b double layer underlayment 711 kb 322 kb mc02 vent pipe flashing 626 kb 349 kb mc03 valley. Flat roofs aren t architecturally logical as rain and snow will shed much more quickly off a sloped roof. The major difference between the warm flat roof and the cold flat roof has to do with the air flow between the roofing timbers known as joists that help to hold up the roof. Poorly constructed roofs endanger the people living in a building so you need to make the roof compatible to the rest of the building in a well engineered style.

A flat roof usually consists of the following. Flat roofs usually come with a 10 to 20 year warranty but can last 25 years if you build the roofs right and maintain them using commonsense rules. However depending on the severity of the damage and the type of material installed repairing a flat roof can cost as much as 600 800. A typical flat roof repair costs at least 350 400 and involves locating sources of leaks and patching the seams or holes.

But now flat roofs often are constructed with fewer layers because of improved waterproofing technology. Of all these membrane types epdm synthetic rubber is the most common single ply membrane roof material in both residential and commercial use. In the warm flat roof construction there is insulation packed into every possible space where air can flow. Flat roofs are hard to replace.

Pros and cons for flat roof materials. Although simple and utilitarian the main goal of a roof system is to maintain the watertight integrity of a building and keep its contents dry. Yet for historic modern style buildings like this old house s cambridge tv project flat roofs are at the core of the architecture meant to reflect the broad horizontal lines of the natural landscape. Pvc membranes are easy to maintain and repair.

Although flat roofs are cheaper to build than pitched roofs they have a shorter life span. Of course you don t need to live in a modern house to deal with a flat roof. Waterproof membrane to prevent water penetrating the structure and interior of the. Flat roof construction for residential.